THE GKAPSOID CRABS OF AMERICA. 421 



Desn'ipfion. — A small, semicylindrical species. Carapace strongly 

 narrowed behind; surface smooth, depressions shalloAv. Front about 

 one-fouilh width of carapace, its anterior border subtruncate. Upper 

 margin of orbit very oblique, slightly sinuous. Eyebrow partly vis- 

 ible from above. Carapace Avidest at the antero-lateral angles, which 

 are prominent and acutangular or rectangular. Side margins straight 

 or a little concave in front; then after a very obtuse angle they form 

 a sinuous line. 



The merus of the large cheliped of the male is longer than the 

 carapace and bears short and fine, granulated rugae. The carpus and 

 manus are coarsely granulate above, the granules of the palm be- 

 coming smaller on the outside. The palm turns over rather abruptly 

 above. Fingers one and one-half times as long as palm, narrow; a 

 large tubercle at middle of dactylus, another at its basal fourth ; be- 

 tween these tw^o there is a low tooth on the poUex. and another sub- 

 terminal. A coarsel}^ tuberculate ridge on inner side of palm, upper 

 half transverse, loAver half oblique as usual. Surface distal to the 

 ridge smooth. 



Merus joints of ambulatory legs more dilated than in U. steno- 

 dactylus. Legs crossed by transverse bands of dark spots. Third to 

 sixth abdominal segments in male more or less fused. 



2Ieasurements. — Male (24546), length of carapace 6, width of 

 same 9.8 mm. 



Ranye. — West coast of Florida; Bahamas; West Indies; Mexico 

 to Santos, Brazil. 



Material examiTied. — 



West Florida; J. E. Benedict; 1901: 1 female (25557). 



Green Turtle Cay, Bahamas; E. A. Andrews; 4 males (22314). 



Xear Fort Montagu, Nassau, New Providence, Bahamas; holes in 

 sand between tides about 5-6 inches deep; Jan. 28, 1890; J. I. North- 

 rup: 1 male, 1 female (22315). 



New Providence, Bahamas; Albatross; 3 males (11384). 



Baracoa, Cuba; tidal fiat; Jan. 29, 1902; Wm. Palmer; 2 males, 2 

 females (25548). 



Jamaica; T. H. Morgan; 4 males, 1 female (22316). 



San Antonio Bridge, San Juan. Porto Rico; Jan. 14. 1899; Fish 

 Hau'l-; 13 males. 9 females (24546). 



Fajardo, Porto Eico; Feb. 17, 1899; F'tsh Hawl',- 1 female (24549). 



Ensenada Honda, Culebra, Porto Rico; Feb. 9, 1899; Fish Hawk; 

 1 female (24548). 



Mexico; T. B. Wilson; 3 males, labeled by Guerin (^Nlus. Phila. 

 Acad.). 



Amarracao, State of Paiuhy, Brazil; 1913; Fr. Tglezias; 1 male 

 (48894). 



